Silverado 3500 2WD V8-6.0L VIN U (2004)
Oil Pressure Sensor: All Technical Service Bulletins
Instruments - High/Low Erratic Oil Pressure Readings
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 04-06-04-065
Date: September, 2004
ADVANCED SERVICE INFORMATION
Subject:
ENGINEERING INVESTIGATION (EI # 04073) - High, Low or Erratic Oil Pressure Gauge Reading Setting DTCs P0522 and/or P0523
Models:
2004 Chevrolet Avalanche, Express, Silverado, Tahoe, Suburban
2004 GMC Savana, Sierra, Yukon, Yukon XL
2004 Isuzu W4
Equipped with 6.0L Engine ONLY (VIN Code U - RPO L04)
Attention:
GM of Canada dealers are not authorized to utilize this service bulletin.
Condition
Important:
This bulletin only applies to those vehicles identified in GM VIS by Engineering Investigation number 04073 AND the customer's concern is for an
erratic gauge reading and DTC P0522 or P0523 is set. All other vehicles should not use this bulletin. If GM VIS shows an EI 04073 is open for this
vehicle but the customer does not comment on an erratic gauge reading, DO NOT perform this bulletin.
The customer may comment about a high, low or erratic oil pressure gauge reading and the engine oil pressure indicator being illuminated. The
technician will find DTCs P0522 and/or P0523 stored in the PCM. The PCM displays this information in the "Failure Records" on the scan tool.
Cause
GM Engineering is attempting to determine the root cause of Oil Pressure Sensor replacements. General Motors has a need to obtain technical
information first hand from the dealer technician BEFORE and during diagnosis and repair. As a result, this information will be used by Engineering to
help "root-cause" the customer's concern and develop/validate a field fix.
Important:
^
By using the Tech 2, obtain the engine oil pressure sensor voltage reading. It is important to have this information PRIOR to contacting the
engineer.
^
All U.S. Dealers, please contact engineer Brian Kozumplik. BEFORE proceeding. If Brian can not be reached immediately, leave a message with
the VIN, Dealer Name, Dealer Phone Number, Caller's Name and Voltage Reading. Then proceed with the following corrective action.
Correction
Follow the diagnostic procedures for P0522 and/or P0523, found in SI.
If the SI diagnostics did not isolate the concern, OR if it leads to an oil pressure sensor connection concern, perform the following steps:
1.
Cut off the oil pressure sensor wire harness 25.4 mm (1 in) from the connector.
Important:
Do NOT disconnect the sensor from the connector.
2.
Remove the oil pressure sensor with the 25.4 mm (1 in) of harness and connector still connected.
3.
Install a new oil pressure sensor using the one listed in the GMSPO parts catalog.
4.
Repair the harness by installing an oil pressure sensor connector harness kit, P/N 12102748. This kit comes with a connector, attached leads and
Duraseal splice sleeves. DO NOT solder the circuits when installing this service kit. Soldering the splice can impact the performance of the circuit.
Instead, use the included splice sleeves and follow the procedure below:
